C0196

DTC C0196

Circuit Description
The electronic brake control module (EBCM) uses the yaw rate signal to determine the directional angle of the vehicle during a turn or a skid. The EBCM uses the signal from the yaw rate as one of the inputs to operate the vehicle stability enhancement system (VSES).

DTC Descriptor
This diagnostic procedure supports this DTC:
DTC C0196 Yaw Rate Circuit

Conditions for Running the DTC
The ignition voltage is greater than 8 volts.

Conditions for Setting the DTC
The EBCM will set the DTC when one or more of these conditions have occurred:
^ The yaw rate signal is less than 0.18 volt or greater than 4.84 volts.
^ The yaw rate signal changes to rapidly based on vehicle dynamics.
^ The internal calibration in the yaw rate is out of range.
^ The yaw and lateral acceleration sensor has failed and internal self check test.

Action Taken When the DTC Sets
If equipped, these actions will occur:
^ The EBCM disables VSES for the duration of the ignition cycle.
^ The driver information center (DIC) displays the Service Stability System message.

Conditions for Clearing the DTC
^ The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
^ The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids
The lateral accelerometer is packaged with the yaw rate sensor as a single component.

Test Description








These numbers refer to the step numbers on the diagnostic table.
2. Tests for the proper voltage output on the 5-volt reference circuit and the proper operation of the signal circuit.
3. Tests for possible low 5-volt reference output or a problem with the signal circuit.
4. Tests for a short to voltage on the 5-volt reference circuit. If a short to voltage exists, other DTCs may be set for the vehicle stability system.
8. Tests for a problem with the low reference circuit. If a short to voltage exists, other DTCs may be set for the vehicle stability system.